阅读说明：本技术 一种客车用大功率燃料电池控制方法 (Control method of high-power fuel cell for passenger car ) 是由 云大笑 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种客车用大功率燃料电池控制方法,包括以下步骤：S1：车辆开启,车载控制器执行上电流程；S2：车载控制器完成上电流程；S3：车载控制器接收到燃料电池启堆指令；S4：燃料电池控制器升压DCDC预充；S5：车载控制器判断SOC是否不大于第一阈值a,若是,执行步骤S6；若否,燃料电池系统处于待机状态；S6：车载控制器判断整车和燃料电池系统状态,若正常,执行步骤S7；若异常,发送停机指令、且不再相应启堆指令；S7：车载控制器向燃料电池系统发出启堆指令；S8：燃料电池系统发出允许加载功率指令；S9：车载控制器判断SOC和第二阈值b、第三阈值c、第四阈值d的大小关系,并执行相对应策略。本发明有效保护整车安全,增加车辆行驶里程。(The invention discloses a control method of a high-power fuel cell for a passenger car, which comprises the following steps: s1: starting the vehicle, and executing a power-on process by the vehicle-mounted controller; s2: the vehicle-mounted controller completes the power-on process; s3: the vehicle-mounted controller receives a fuel cell stack starting command; s4: boosting DCDC pre-charging of a fuel cell controller; s5: the vehicle-mounted controller judges whether the SOC is not greater than a first threshold value a, if so, the step S6 is executed; if not, the fuel cell system is in a standby state; s6: the vehicle-mounted controller judges the states of the whole vehicle and the fuel cell system, and if the states are normal, the step S7 is executed; if the abnormal condition exists, sending a shutdown instruction, and not corresponding to a stack starting instruction any more; s7: the vehicle-mounted controller sends a stack starting instruction to the fuel cell system; s8: the fuel cell system sends out a load-allowable power instruction; s9: and the vehicle-mounted controller judges the size relationship between the SOC and the second threshold b, the third threshold c and the fourth threshold d, and executes a corresponding strategy. The invention effectively protects the safety of the whole vehicle and increases the driving mileage of the vehicle.)

1. A control method of a high-power fuel cell for a passenger car is characterized by comprising the following steps:

s1: starting the vehicle, and executing a power-on process by the vehicle-mounted controller;

s2: the vehicle-mounted controller completes the power-on process;

s3: the vehicle-mounted controller receives a fuel cell stack starting command;

s4: boosting DCDC pre-charging of a fuel cell controller;

s5: the vehicle-mounted controller judges whether the SOC is not greater than a first threshold value a, if so, the step S6 is executed;

if not, the fuel cell system is in a standby state;

s6: the vehicle-mounted controller judges the states of the whole vehicle and the fuel cell system, and if the states are normal, the step S7 is executed;

if the abnormal condition exists, sending a shutdown instruction, and not corresponding to a stack starting instruction any more;

s7: the vehicle-mounted controller sends a stack starting instruction to the fuel cell system;

s8: the fuel cell system sends out a load-allowable power instruction;

s9: the vehicle-mounted controller judges the size relationship between the SOC and the second threshold b, the third threshold c and the fourth threshold d, and the method specifically comprises the following steps:

s901: when the SOC is not greater than the second threshold value b, step S10 is executed;

s902: when the SOC is greater than the second threshold value b and not greater than the third threshold value c, step S13 is executed;

s903: when the SOC is greater than the third threshold value c and not greater than the fourth threshold value d, step S16 is executed;

s10: the vehicle-mounted controller sends out a first target power x;

s11: the corresponding requirements of the FCU;

s12: the vehicle-mounted controller judges the SOC, when the SOC is larger than a second threshold value b, the step S13 is executed, otherwise, the step S5 is executed;

s13: the vehicle-mounted controller sends out a second target power y;

s14: the corresponding requirements of the FCU;

s15: the vehicle-mounted controller judges the SOC, when the SOC is larger than a third threshold value c, the step S16 is executed, otherwise, the step S5 is executed;

s16: the vehicle-mounted controller sends out a third target power z;

s17: the corresponding requirements of the FCU;

s18: the vehicle-mounted controller judges the SOC, when the SOC is larger than a fourth threshold value d, the step S19 is executed, otherwise, the step S5 is executed;

s19: the vehicle-mounted controller sends an FCU shutdown instruction, and the fuel cell system is in a standby state.

2. The control method of a high-power fuel cell for a passenger car according to claim 1, characterized in that: the first target power x > the second target power y > the third target power z.

3. The control method of a high-power fuel cell for a passenger car according to claim 1, characterized in that: the first target power x is 60 KW; the second target power y is 40 KW; the third target power z is 20 KW.

4. The control method of a high-power fuel cell for a passenger car according to claim 1, characterized in that: the value of the first threshold value a is 80%; the value of the second threshold b is 50%; the third threshold value c takes the value of 70%; the value of the fourth threshold d is 88%.

The technical field is as follows:

the invention belongs to the field of motor vehicle fuel cell control, and particularly relates to a control method of a high-power fuel cell for a passenger car.

Background art:

the new energy automobile is more and more seriously viewed by people because of zero emission and mature technical development, the endurance mileage of the automobile is continuously improved due to the repeated improvement of the energy density of the power battery, but the pure electric automobile can only cover urban public transport and short-distance travel lines at present, and the long-distance transportation demand is mainly the traditional fuel oil automobile at present. With the rapid improvement of fuel cell technology, the improvement of hydrogen energy storage and hydrogen station construction, the mixed use of fuel cells and power cells is gradually applied to new energy vehicles. The aim of the industry is to ensure good coupling between the fuel cell engine and the power battery to satisfy the operation of the driving motor, to achieve smooth operation of the vehicle, to reduce energy consumption of the fuel cell during operation, and to increase the driving mileage.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

The invention content is as follows:

the invention aims to provide a control method of a high-power fuel cell for a passenger car, thereby overcoming the defects in the prior art.

In order to achieve the above object, the present invention provides a control method of a high-power fuel cell for a passenger car, comprising the following steps;

s1: starting the vehicle, and executing a power-on process by the vehicle-mounted controller;

s2: the vehicle-mounted controller completes the power-on process;

s3: the vehicle-mounted controller receives a fuel cell stack starting command;

s4: boosting DCDC pre-charging of a fuel cell controller;

s5: the vehicle-mounted controller judges whether the SOC is not greater than a first threshold value a, if so, the step S6 is executed; if not, the fuel cell system is in a standby state;

s6: the vehicle-mounted controller judges the states of the whole vehicle and the fuel cell system, and if the states are normal, the step S7 is executed; if the abnormal condition exists, sending a shutdown instruction, and not corresponding to a stack starting instruction any more;

s7: the vehicle-mounted controller sends a stack starting instruction to the fuel cell system;

s8: the fuel cell system sends out a load-allowable power instruction;

s9: the vehicle-mounted controller judges the size relationship between the SOC and the second threshold value b, the third threshold value c and the fourth threshold value d, and the method specifically comprises the following steps:

s901: when the SOC is not greater than the second threshold value b, step S10 is executed;

s902: when the SOC is greater than the second threshold value b and not greater than the third threshold value c, step S13 is executed;

s903: when the SOC is greater than the third threshold value c and not greater than the fourth threshold value d, step S16 is executed;

s10: the vehicle-mounted controller sends out a first target power x;

s11: the corresponding requirements of the FCU;

s12: the vehicle-mounted controller judges the SOC, when the SOC is larger than a second threshold value b, the step S13 is executed, otherwise, the step S5 is executed;

s13: the vehicle-mounted controller sends out a second target power y;

s14: the corresponding requirements of the FCU;

s15: the vehicle-mounted controller judges the SOC, when the SOC is larger than a third threshold value c, the step S16 is executed, otherwise, the SOC is larger than the third threshold value c

Step S5 is executed;

s16: the vehicle-mounted controller sends out a third target power z;

s17: the corresponding requirements of the FCU;

s18: the vehicle-mounted controller judges the SOC, when the SOC is larger than a fourth threshold value d, the step S19 is executed, otherwise, the SOC is larger than the fourth threshold value d

Step S5 is executed;

s19: the vehicle-mounted controller sends an FCU shutdown instruction, and the fuel cell system is in a standby state.

Further, the first target power x > the second target power y > the third target power z.

Further, the first target power x is 60 KW; the second target power y is 40 KW; the third target power z is 20 KW.

Further, the value of the first threshold a is 80%; the value of the second threshold b is 50%; the third threshold value c takes the value of 70%; the value of the fourth threshold d is 88%.

Compared with the prior art, the invention has the following beneficial effects:

the control method of the high-power fuel cell for the passenger car has the following advantages: 1) firstly, detecting the hydrogen concentration, and then electrifying at high voltage, thereby effectively protecting the safety of the whole vehicle; 2) under the condition of different soc values of the power battery, the fuel battery system outputs corresponding power, so that energy waste of the fuel battery system is avoided, and the driving mileage of the vehicle is greatly improved.

Description of the drawings:

FIG. 1 is a schematic flow chart of the steps of the present invention.

The specific implementation mode is as follows:

the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

The control method of the high-power fuel cell for the passenger car of the embodiment, as shown in fig. 1, includes the following steps:

s1: starting the vehicle, and executing a power-on process by the vehicle-mounted controller;

s2: the vehicle-mounted controller completes the power-on process;

s3: the vehicle-mounted controller receives a fuel cell stack starting command;

s4: boosting DCDC pre-charging of a fuel cell controller;

s5: the vehicle-mounted controller determines whether the SOC is not greater than the first threshold value a (the first threshold value a is 80%), and if so, executes step S6; if not, the fuel cell system is in a standby state;

s6: the vehicle-mounted controller judges the states of the whole vehicle and the fuel cell system, and if the states are normal, the step S7 is executed;

if the abnormal condition exists, sending a shutdown instruction, and not corresponding to a stack starting instruction any more;

s7: the vehicle-mounted controller sends a stack starting instruction to the fuel cell system;

s8: the fuel cell system sends out a load-allowable power instruction;

s9: the vehicle-mounted controller judges the SOC and the sizes of the second threshold value b, the third threshold value c and the fourth threshold value d

The relation specifically comprises the following steps:

s901: when the SOC is not greater than the second threshold value b (the second threshold value b is 50%), step S10 is executed;

s902: SOC is larger than a second threshold value b and not larger than a third threshold value c (70%)

Then, step S13 is executed;

s903: the SOC is greater than a third threshold value c (70%) and not greater than a fourth threshold value d

(the fourth threshold value d ═ 88%), step S16 is executed;

s10: the vehicle-mounted controller sends out a first target power x (the first target power x is 60 KW);

s11: the corresponding requirements of the FCU;

s12: when the vehicle-mounted controller judges the SOC, and the SOC is greater than the second threshold b (the second threshold b is 50%), executing step S13, otherwise, executing step S5;

s13: the vehicle-mounted controller sends out a second target power y (the second target power y is 40 KW);

s14: the corresponding requirements of the FCU;

s15: when the vehicle-mounted controller judges the SOC, and the SOC is greater than the third threshold c (the third threshold c is 70%), executing step S16, otherwise, executing step S5;

s16: the vehicle-mounted controller sends out a third target power z (the third target power z is 20 KW);

s17: the corresponding requirements of the FCU;

s18: when the vehicle-mounted controller judges the SOC, and the SOC is greater than the fourth threshold value d (the fourth threshold value d is 88%), executing step S19, otherwise, executing step S5;

s19: the vehicle-mounted controller sends an FCU shutdown instruction, and the fuel cell system is in a standby state.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.